Arrived to remedy a system that’s not functioning properly. Performed diagnostic on the system. Could not make heads or tails of the wiring between the air handler and the thermostat. Fixed the wired connections between the air handler and the thermostat. Found that the thermostat was not programmed properly for a heat pump with heat strips. Switched system over to heat pump mode. Performed diagnostic on the circuit that controls the heat pump up on the roof. Found that the old float switch had failed and was not allowing the heat pump to receive signal from the thermostat or air handler. Replaced the float switch and tested system operations. Verified that the thermostat will turn on the electric heat strips and turn them back off. Verified that the thermostat will turn on the heat pump and turn it back off accordingly. System is functioning properly at this time.